CPE Ergonomic Interventions & Solutions 5

Question 1

A CPE is evaluating a production line where workers sort small parts under magnification. The recommended illuminance level for fine inspection tasks according to the IES Lighting Handbook is closest to:

Accepted Answer

1000–2000 lux or more

Answer

Fine and precise visual inspection tasks typically require 1000–2000 lux of task illuminance per IES standards, significantly higher than general office or assembly lighting.

Question 2

A construction ergonomist recommends knee pads for workers who kneel on hard surfaces for more than 30 minutes continuously. This recommendation primarily addresses which risk factor?

Accepted Answer

Contact stress and sustained awkward posture

Answer

Prolonged kneeling creates sustained contact stress on the prepatellar bursa and maintains the knee in a highly flexed posture, both of which knee pads directly mitigate.

Question 3

A cold storage warehouse requires workers to handle product at -10°F. Which ergonomic intervention is MOST critical in this environment beyond standard PPE?

Accepted Answer

Providing insulated anti-fatigue matting to reduce cold floor conduction through feet and legs

Answer

Cold conduction through the feet reduces tactile sensitivity and increases grip force demands; insulated matting is a direct engineering control that mitigates cold-related musculoskeletal and vascular risk.

Question 4

An ergonomist discovers that a newly installed ergonomic intervention is disliked by workers and being bypassed. According to change management principles, the BEST next step is to:

Accepted Answer

Conduct a follow-up session with workers to identify specific concerns and co-develop modifications

Answer

Engaging workers in follow-up problem solving addresses root concerns, improves buy-in, and often yields practical modifications that make the intervention more effective and acceptable.

Question 5

Which ergonomic intervention most effectively reduces whole-body vibration exposure for a forklift operator working a full shift?

Accepted Answer

Installing a suspension seat engineered to attenuate the primary resonance frequency of the vehicle

Answer

A suspension seat tuned to attenuate the vehicle's dominant vibration frequency directly reduces the vibration transmitted to the operator's body — the highest-efficacy engineering control for WBV.

(CPE) Certified Professional Ergonomist Practice Test

(CPE) Certified Professional Ergonomist Practice Test

CPE Ergonomic Interventions & Solutions 5